$**$Make sure to draw diagram and solve it using mass balances

Problem

If $100g$ of $N{a}_{2}S{O}_4$ are dissolved in $200g$ of $H_{2}O$ and the solution is cooled

until $100g$ of $N{a}_{2}S{O}_4*10H_{2}O$ crystallize out, find $($a$)$ the composition of the

remaining solution $($mother liquor$),$ and $($b$)$ the grams of crystals recovered per

$100g$ of initial solution.

Hint: Treat the hydrated crystals as a separate stream leaving the process.